What shows that Torvald loves Nora?

From the text:

Helmer. I have it in me to become a different man. Helmer. Nora--can I never be anything more than a stranger to you?

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Nora [taking her bag]. Ah, Torvald, the most wonderful thing of all would have to happen.

Helmer. Tell me what that would be!

Nora. Both you and I would have to be so changed that--. Oh, Torvald, I don't believe any longer in wonderful things happening.

Helmer. But I will believe in it. Tell me! So changed that--?

Nora. That our life together would be a real wedlock. Goodbye. [She goes out through the hall.]

Helmer [sinks down on a chair at the door and buries his face in his hands]. Nora! Nora! [Looks round, and rises.] Empty. She is gone. [A hope flashes across his mind.] The most wonderful thing of all--?

In a descriptive explanation, the various examples how Torvald use to speak with Nora, how he used to address her like

"Hasn't Miss Sweet Tooth been breaking rules in town today? […] taken a bite at a macaroon or two?

"My little songbird must never do that again. A songbird must have a clean beak to chirp with—no false notes!" (1.435)

"Well, we will share it, Nora, as man and wife should. That is how it shall be. act 1

Helmer seems to be aware of the concept that marriage is a shared experience. These adjectives like sweet tooth, songbird signifies that he used to treat her like a child , and as a father figure. However, he always used to underestimate Nora and considered as naive and simple and childish . His love for Nora can be interpretated through the times it was written and how ladies were expected to act silly ,fool and pretty without thoughtful minds.